/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include <core/client.h>
#include <core/handle.h>
#include <core/namedb.h>
#include <core/gpuobj.h>
#include <core/engctx.h>
#include <core/event.h>
#include <core/class.h>
#include <core/enum.h>

#include <subdev/timer.h>
#include <subdev/bar.h>
#include <subdev/fb.h>
#include <subdev/vm.h>

#include <engine/dmaobj.h>

#include "nve0.h"

#define _(a,b) { (a), ((1ULL << (a)) | (b)) }
static const struct {
	u64 subdev;
	u64 mask;
} fifo_engine[] = {
	_(NVDEV_ENGINE_GR      , (1ULL << NVDEV_ENGINE_SW) |
				 (1ULL << NVDEV_ENGINE_COPY2)),
	_(NVDEV_ENGINE_VP      , 0),
	_(NVDEV_ENGINE_PPP     , 0),
	_(NVDEV_ENGINE_BSP     , 0),
	_(NVDEV_ENGINE_COPY0   , 0),
	_(NVDEV_ENGINE_COPY1   , 0),
	_(NVDEV_ENGINE_VENC    , 0),
};
#undef _
#define FIFO_ENGINE_NR ARRAY_SIZE(fifo_engine)

struct nve0_fifo_engn {
	struct nouveau_gpuobj *runlist[2];
	int cur_runlist;
	wait_queue_head_t wait;
};

struct nve0_fifo_priv {
	struct nouveau_fifo base;

	struct work_struct fault;
	u64 mask;

	struct nve0_fifo_engn engine[FIFO_ENGINE_NR];
	struct {
		struct nouveau_gpuobj *mem;
		struct nouveau_vma bar;
	} user;
	int spoon_nr;
};

struct nve0_fifo_base {
	struct nouveau_fifo_base base;
	struct nouveau_gpuobj *pgd;
	struct nouveau_vm *vm;
};

struct nve0_fifo_chan {
	struct nouveau_fifo_chan base;
	u32 engine;
	enum {
		STOPPED,
		RUNNING,
		KILLED
	} state;
};

/*******************************************************************************
 * FIFO channel objects
 ******************************************************************************/

static void
nve0_fifo_runlist_update(struct nve0_fifo_priv *priv, u32 engine)
{
	struct nouveau_bar *bar = nouveau_bar(priv);
	struct nve0_fifo_engn *engn = &priv->engine[engine];
	struct nouveau_gpuobj *cur;
	int i, p;

	mutex_lock(&nv_subdev(priv)->mutex);
	cur = engn->runlist[engn->cur_runlist];
	engn->cur_runlist = !engn->cur_runlist;

	for (i = 0, p = 0; i < priv->base.max; i++) {
		struct nve0_fifo_chan *chan = (void *)priv->base.channel[i];
		if (chan && chan->state == RUNNING && chan->engine == engine) {
			nv_wo32(cur, p + 0, i);
			nv_wo32(cur, p + 4, 0x00000000);
			p += 8;
		}
	}
	bar->flush(bar);

	nv_wr32(priv, 0x002270, cur->addr >> 12);
	nv_wr32(priv, 0x002274, (engine << 20) | (p >> 3));

	if (wait_event_timeout(engn->wait, !(nv_rd32(priv, 0x002284 +
			       (engine * 0x08)) & 0x00100000),
				msecs_to_jiffies(2000)) == 0)
		nv_error(priv, "runlist %d update timeout\n", engine);
	mutex_unlock(&nv_subdev(priv)->mutex);
}

static int
nve0_fifo_context_attach(struct nouveau_object *parent,
			 struct nouveau_object *object)
{
	struct nouveau_bar *bar = nouveau_bar(parent);
	struct nve0_fifo_base *base = (void *)parent->parent;
	struct nouveau_engctx *ectx = (void *)object;
	u32 addr;
	int ret;

	switch (nv_engidx(object->engine)) {
	case NVDEV_ENGINE_SW   :
		return 0;
	case NVDEV_ENGINE_COPY0:
	case NVDEV_ENGINE_COPY1:
	case NVDEV_ENGINE_COPY2:
		nv_engctx(ectx)->addr = nv_gpuobj(base)->addr >> 12;
		return 0;
	case NVDEV_ENGINE_GR   : addr = 0x0210; break;
	case NVDEV_ENGINE_BSP  : addr = 0x0270; break;
	case NVDEV_ENGINE_VP   : addr = 0x0250; break;
	case NVDEV_ENGINE_PPP  : addr = 0x0260; break;
	default:
		return -EINVAL;
	}

	if (!ectx->vma.node) {
		ret = nouveau_gpuobj_map_vm(nv_gpuobj(ectx), base->vm,
					    NV_MEM_ACCESS_RW, &ectx->vma);
		if (ret)
			return ret;

		nv_engctx(ectx)->addr = nv_gpuobj(base)->addr >> 12;
	}

	nv_wo32(base, addr + 0x00, lower_32_bits(ectx->vma.offset) | 4);
	nv_wo32(base, addr + 0x04, upper_32_bits(ectx->vma.offset));
	bar->flush(bar);
	return 0;
}

static int
nve0_fifo_context_detach(struct nouveau_object *parent, bool suspend,
			 struct nouveau_object *object)
{
	struct nouveau_bar *bar = nouveau_bar(parent);
	struct nve0_fifo_priv *priv = (void *)parent->engine;
	struct nve0_fifo_base *base = (void *)parent->parent;
	struct nve0_fifo_chan *chan = (void *)parent;
	u32 addr;

	switch (nv_engidx(object->engine)) {
	case NVDEV_ENGINE_SW   : return 0;
	case NVDEV_ENGINE_COPY0:
	case NVDEV_ENGINE_COPY1:
	case NVDEV_ENGINE_COPY2: addr = 0x0000; break;
	case NVDEV_ENGINE_GR   : addr = 0x0210; break;
	case NVDEV_ENGINE_BSP  : addr = 0x0270; break;
	case NVDEV_ENGINE_VP   : addr = 0x0250; break;
	case NVDEV_ENGINE_PPP  : addr = 0x0260; break;
	default:
		return -EINVAL;
	}

	nv_wr32(priv, 0x002634, chan->base.chid);
	if (!nv_wait(priv, 0x002634, 0xffffffff, chan->base.chid)) {
		nv_error(priv, "channel %d [%s] kick timeout\n",
			 chan->base.chid, nouveau_client_name(chan));
		if (suspend)
			return -EBUSY;
	}

	if (addr) {
		nv_wo32(base, addr + 0x00, 0x00000000);
		nv_wo32(base, addr + 0x04, 0x00000000);
		bar->flush(bar);
	}

	return 0;
}

static int
nve0_fifo_chan_ctor(struct nouveau_object *parent,
		    struct nouveau_object *engine,
		    struct nouveau_oclass *oclass, void *data, u32 size,
		    struct nouveau_object **pobject)
{
	struct nouveau_bar *bar = nouveau_bar(parent);
	struct nve0_fifo_priv *priv = (void *)engine;
	struct nve0_fifo_base *base = (void *)parent;
	struct nve0_fifo_chan *chan;
	struct nve0_channel_ind_class *args = data;
	u64 usermem, ioffset, ilength;
	int ret, i;

	if (size < sizeof(*args))
		return -EINVAL;

	for (i = 0; i < FIFO_ENGINE_NR; i++) {
		if (args->engine & (1 << i)) {
			if (nouveau_engine(parent, fifo_engine[i].subdev)) {
				args->engine = (1 << i);
				break;
			}
		}
	}

	if (i == FIFO_ENGINE_NR) {
		nv_error(priv, "unsupported engines 0x%08x\n", args->engine);
		return -ENODEV;
	}

	ret = nouveau_fifo_channel_create(parent, engine, oclass, 1,
					  priv->user.bar.offset, 0x200,
					  args->pushbuf,
					  fifo_engine[i].mask, &chan);
	*pobject = nv_object(chan);
	if (ret)
		return ret;

	nv_parent(chan)->context_attach = nve0_fifo_context_attach;
	nv_parent(chan)->context_detach = nve0_fifo_context_detach;
	chan->engine = i;

	usermem = chan->base.chid * 0x200;
	ioffset = args->ioffset;
	ilength = order_base_2(args->ilength / 8);

	for (i = 0; i < 0x200; i += 4)
		nv_wo32(priv->user.mem, usermem + i, 0x00000000);

	nv_wo32(base, 0x08, lower_32_bits(priv->user.mem->addr + usermem));
	nv_wo32(base, 0x0c, upper_32_bits(priv->user.mem->addr + usermem));
	nv_wo32(base, 0x10, 0x0000face);
	nv_wo32(base, 0x30, 0xfffff902);
	nv_wo32(base, 0x48, lower_32_bits(ioffset));
	nv_wo32(base, 0x4c, upper_32_bits(ioffset) | (ilength << 16));
	nv_wo32(base, 0x84, 0x20400000);
	nv_wo32(base, 0x94, 0x30000001);
	nv_wo32(base, 0x9c, 0x00000100);
	nv_wo32(base, 0xac, 0x0000001f);
	nv_wo32(base, 0xe8, chan->base.chid);
	nv_wo32(base, 0xb8, 0xf8000000);
	nv_wo32(base, 0xf8, 0x10003080); /* 0x002310 */
	nv_wo32(base, 0xfc, 0x10000010); /* 0x002350 */
	bar->flush(bar);
	return 0;
}

static int
nve0_fifo_chan_init(struct nouveau_object *object)
{
	struct nouveau_gpuobj *base = nv_gpuobj(object->parent);
	struct nve0_fifo_priv *priv = (void *)object->engine;
	struct nve0_fifo_chan *chan = (void *)object;
	u32 chid = chan->base.chid;
	int ret;

	ret = nouveau_fifo_channel_init(&chan->base);
	if (ret)
		return ret;

	nv_mask(priv, 0x800004 + (chid * 8), 0x000f0000, chan->engine << 16);
	nv_wr32(priv, 0x800000 + (chid * 8), 0x80000000 | base->addr >> 12);

	if (chan->state == STOPPED && (chan->state = RUNNING) == RUNNING) {
		nv_mask(priv, 0x800004 + (chid * 8), 0x00000400, 0x00000400);
		nve0_fifo_runlist_update(priv, chan->engine);
		nv_mask(priv, 0x800004 + (chid * 8), 0x00000400, 0x00000400);
	}

	return 0;
}

static int
nve0_fifo_chan_fini(struct nouveau_object *object, bool suspend)
{
	struct nve0_fifo_priv *priv = (void *)object->engine;
	struct nve0_fifo_chan *chan = (void *)object;
	u32 chid = chan->base.chid;

	if (chan->state == RUNNING && (chan->state = STOPPED) == STOPPED) {
		nv_mask(priv, 0x800004 + (chid * 8), 0x00000800, 0x00000800);
		nve0_fifo_runlist_update(priv, chan->engine);
	}

	nv_wr32(priv, 0x800000 + (chid * 8), 0x00000000);
	return nouveau_fifo_channel_fini(&chan->base, suspend);
}

static struct nouveau_ofuncs
nve0_fifo_ofuncs = {
	.ctor = nve0_fifo_chan_ctor,
	.dtor = _nouveau_fifo_channel_dtor,
	.init = nve0_fifo_chan_init,
	.fini = nve0_fifo_chan_fini,
	.rd32 = _nouveau_fifo_channel_rd32,
	.wr32 = _nouveau_fifo_channel_wr32,
};

static struct nouveau_oclass
nve0_fifo_sclass[] = {
	{ NVE0_CHANNEL_IND_CLASS, &nve0_fifo_ofuncs },
	{}
};

/*******************************************************************************
 * FIFO context - instmem heap and vm setup
 ******************************************************************************/

static int
nve0_fifo_context_ctor(struct nouveau_object *parent,
		    struct nouveau_object *engine,
		    struct nouveau_oclass *oclass, void *data, u32 size,
		    struct nouveau_object **pobject)
{
	struct nve0_fifo_base *base;
	int ret;

	ret = nouveau_fifo_context_create(parent, engine, oclass, NULL, 0x1000,
				          0x1000, NVOBJ_FLAG_ZERO_ALLOC, &base);
	*pobject = nv_object(base);
	if (ret)
		return ret;

	ret = nouveau_gpuobj_new(nv_object(base), NULL, 0x10000, 0x1000, 0,
				&base->pgd);
	if (ret)
		return ret;

	nv_wo32(base, 0x0200, lower_32_bits(base->pgd->addr));
	nv_wo32(base, 0x0204, upper_32_bits(base->pgd->addr));
	nv_wo32(base, 0x0208, 0xffffffff);
	nv_wo32(base, 0x020c, 0x000000ff);

	ret = nouveau_vm_ref(nouveau_client(parent)->vm, &base->vm, base->pgd);
	if (ret)
		return ret;

	return 0;
}

static void
nve0_fifo_context_dtor(struct nouveau_object *object)
{
	struct nve0_fifo_base *base = (void *)object;
	nouveau_vm_ref(NULL, &base->vm, base->pgd);
	nouveau_gpuobj_ref(NULL, &base->pgd);
	nouveau_fifo_context_destroy(&base->base);
}

static struct nouveau_oclass
nve0_fifo_cclass = {
	.handle = NV_ENGCTX(FIFO, 0xe0),
	.ofuncs = &(struct nouveau_ofuncs) {
		.ctor = nve0_fifo_context_ctor,
		.dtor = nve0_fifo_context_dtor,
		.init = _nouveau_fifo_context_init,
		.fini = _nouveau_fifo_context_fini,
		.rd32 = _nouveau_fifo_context_rd32,
		.wr32 = _nouveau_fifo_context_wr32,
	},
};

/*******************************************************************************
 * PFIFO engine
 ******************************************************************************/

static inline int
nve0_fifo_engidx(struct nve0_fifo_priv *priv, u32 engn)
{
	switch (engn) {
	case NVDEV_ENGINE_GR   :
	case NVDEV_ENGINE_COPY2: engn = 0; break;
	case NVDEV_ENGINE_BSP  : engn = 1; break;
	case NVDEV_ENGINE_PPP  : engn = 2; break;
	case NVDEV_ENGINE_VP   : engn = 3; break;
	case NVDEV_ENGINE_COPY0: engn = 4; break;
	case NVDEV_ENGINE_COPY1: engn = 5; break;
	case NVDEV_ENGINE_VENC : engn = 6; break;
	default:
		return -1;
	}

	return engn;
}

static inline struct nouveau_engine *
nve0_fifo_engine(struct nve0_fifo_priv *priv, u32 engn)
{
	if (engn >= ARRAY_SIZE(fifo_engine))
		return NULL;
	return nouveau_engine(priv, fifo_engine[engn].subdev);
}

static void
nve0_fifo_recover_work(struct work_struct *work)
{
	struct nve0_fifo_priv *priv = container_of(work, typeof(*priv), fault);
	struct nouveau_object *engine;
	unsigned long flags;
	u32 engn, engm = 0;
	u64 mask, todo;

	spin_lock_irqsave(&priv->base.lock, flags);
	mask = priv->mask;
	priv->mask = 0ULL;
	spin_unlock_irqrestore(&priv->base.lock, flags);

	for (todo = mask; engn = __ffs64(todo), todo; todo &= ~(1 << engn))
		engm |= 1 << nve0_fifo_engidx(priv, engn);
	nv_mask(priv, 0x002630, engm, engm);

	for (todo = mask; engn = __ffs64(todo), todo; todo &= ~(1 << engn)) {
		if ((engine = (void *)nouveau_engine(priv, engn))) {
			nv_ofuncs(engine)->fini(engine, false);
			WARN_ON(nv_ofuncs(engine)->init(engine));
		}
		nve0_fifo_runlist_update(priv, nve0_fifo_engidx(priv, engn));
	}

	nv_wr32(priv, 0x00262c, engm);
	nv_mask(priv, 0x002630, engm, 0x00000000);
}

static void
nve0_fifo_recover(struct nve0_fifo_priv *priv, struct nouveau_engine *engine,
		  struct nve0_fifo_chan *chan)
{
	struct nouveau_object *engobj = nv_object(engine);
	u32 chid = chan->base.chid;
	unsigned long flags;

	nv_error(priv, "%s engine fault on channel %d, recovering...\n",
		       nv_subdev(engine)->name, chid);

	nv_mask(priv, 0x800004 + (chid * 0x08), 0x00000800, 0x00000800);
	chan->state = KILLED;

	spin_lock_irqsave(&priv->base.lock, flags);
	priv->mask |= 1ULL << nv_engidx(engobj);
	spin_unlock_irqrestore(&priv->base.lock, flags);
	schedule_work(&priv->fault);
}

static int
nve0_fifo_swmthd(struct nve0_fifo_priv *priv, u32 chid, u32 mthd, u32 data)
{
	struct nve0_fifo_chan *chan = NULL;
	struct nouveau_handle *bind;
	unsigned long flags;
	int ret = -EINVAL;

	spin_lock_irqsave(&priv->base.lock, flags);
	if (likely(chid >= priv->base.min && chid <= priv->base.max))
		chan = (void *)priv->base.channel[chid];
	if (unlikely(!chan))
		goto out;

	bind = nouveau_namedb_get_class(nv_namedb(chan), 0x906e);
	if (likely(bind)) {
		if (!mthd || !nv_call(bind->object, mthd, data))
			ret = 0;
		nouveau_namedb_put(bind);
	}

out:
	spin_unlock_irqrestore(&priv->base.lock, flags);
	return ret;
}

static const struct nouveau_enum
nve0_fifo_bind_reason[] = {
	{ 0x01, "BIND_NOT_UNBOUND" },
	{ 0x02, "SNOOP_WITHOUT_BAR1" },
	{ 0x03, "UNBIND_WHILE_RUNNING" },
	{ 0x05, "INVALID_RUNLIST" },
	{ 0x06, "INVALID_CTX_TGT" },
	{ 0x0b, "UNBIND_WHILE_PARKED" },
	{}
};

static void
nve0_fifo_intr_bind(struct nve0_fifo_priv *priv)
{
	u32 intr = nv_rd32(priv, 0x00252c);
	u32 code = intr & 0x000000ff;
	const struct nouveau_enum *en;
	char enunk[6] = "";

	en = nouveau_enum_find(nve0_fifo_bind_reason, code);
	if (!en)
		snprintf(enunk, sizeof(enunk), "UNK%02x", code);

	nv_error(priv, "BIND_ERROR [ %s ]\n", en ? en->name : enunk);
}

static const struct nouveau_enum
nve0_fifo_sched_reason[] = {
	{ 0x0a, "CTXSW_TIMEOUT" },
	{}
};

static void
nve0_fifo_intr_sched_ctxsw(struct nve0_fifo_priv *priv)
{
	struct nouveau_engine *engine;
	struct nve0_fifo_chan *chan;
	u32 engn;

	for (engn = 0; engn < ARRAY_SIZE(fifo_engine); engn++) {
		u32 stat = nv_rd32(priv, 0x002640 + (engn * 0x04));
		u32 busy = (stat & 0x80000000);
		u32 next = (stat & 0x07ff0000) >> 16;
		u32 chsw = (stat & 0x00008000);
		u32 save = (stat & 0x00004000);
		u32 load = (stat & 0x00002000);
		u32 prev = (stat & 0x000007ff);
		u32 chid = load ? next : prev;
		(void)save;

		if (busy && chsw) {
			if (!(chan = (void *)priv->base.channel[chid]))
				continue;
			if (!(engine = nve0_fifo_engine(priv, engn)))
				continue;
			nve0_fifo_recover(priv, engine, chan);
		}
	}
}

static void
nve0_fifo_intr_sched(struct nve0_fifo_priv *priv)
{
	u32 intr = nv_rd32(priv, 0x00254c);
	u32 code = intr & 0x000000ff;
	const struct nouveau_enum *en;
	char enunk[6] = "";

	en = nouveau_enum_find(nve0_fifo_sched_reason, code);
	if (!en)
		snprintf(enunk, sizeof(enunk), "UNK%02x", code);

	nv_error(priv, "SCHED_ERROR [ %s ]\n", en ? en->name : enunk);

	switch (code) {
	case 0x0a:
		nve0_fifo_intr_sched_ctxsw(priv);
		break;
	default:
		break;
	}
}

static void
nve0_fifo_intr_chsw(struct nve0_fifo_priv *priv)
{
	u32 stat = nv_rd32(priv, 0x00256c);
	nv_error(priv, "CHSW_ERROR 0x%08x\n", stat);
	nv_wr32(priv, 0x00256c, stat);
}

static void
nve0_fifo_intr_dropped_fault(struct nve0_fifo_priv *priv)
{
	u32 stat = nv_rd32(priv, 0x00259c);
	nv_error(priv, "DROPPED_MMU_FAULT 0x%08x\n", stat);
}

static const struct nouveau_enum
nve0_fifo_fault_engine[] = {
	{ 0x00, "GR", NULL, NVDEV_ENGINE_GR },
	{ 0x03, "IFB", NULL, NVDEV_ENGINE_IFB },
	{ 0x04, "BAR1", NULL, NVDEV_SUBDEV_BAR },
	{ 0x05, "BAR3", NULL, NVDEV_SUBDEV_INSTMEM },
	{ 0x07, "PBDMA0", NULL, NVDEV_ENGINE_FIFO },
	{ 0x08, "PBDMA1", NULL, NVDEV_ENGINE_FIFO },
	{ 0x09, "PBDMA2", NULL, NVDEV_ENGINE_FIFO },
	{ 0x10, "MSVLD", NULL, NVDEV_ENGINE_BSP },
	{ 0x11, "MSPPP", NULL, NVDEV_ENGINE_PPP },
	{ 0x13, "PERF" },
	{ 0x14, "MSPDEC", NULL, NVDEV_ENGINE_VP },
	{ 0x15, "CE0", NULL, NVDEV_ENGINE_COPY0 },
	{ 0x16, "CE1", NULL, NVDEV_ENGINE_COPY1 },
	{ 0x17, "PMU" },
	{ 0x19, "MSENC", NULL, NVDEV_ENGINE_VENC },
	{ 0x1b, "CE2", NULL, NVDEV_ENGINE_COPY2 },
	{}
};

static const struct nouveau_enum
nve0_fifo_fault_reason[] = {
	{ 0x00, "PDE" },
	{ 0x01, "PDE_SIZE" },
	{ 0x02, "PTE" },
	{ 0x03, "VA_LIMIT_VIOLATION" },
	{ 0x04, "UNBOUND_INST_BLOCK" },
	{ 0x05, "PRIV_VIOLATION" },
	{ 0x06, "RO_VIOLATION" },
	{ 0x07, "WO_VIOLATION" },
	{ 0x08, "PITCH_MASK_VIOLATION" },
	{ 0x09, "WORK_CREATION" },
	{ 0x0a, "UNSUPPORTED_APERTURE" },
	{ 0x0b, "COMPRESSION_FAILURE" },
	{ 0x0c, "UNSUPPORTED_KIND" },
	{ 0x0d, "REGION_VIOLATION" },
	{ 0x0e, "BOTH_PTES_VALID" },
	{ 0x0f, "INFO_TYPE_POISONED" },
	{}
};

static const struct nouveau_enum
nve0_fifo_fault_hubclient[] = {
	{ 0x00, "VIP" },
	{ 0x01, "CE0" },
	{ 0x02, "CE1" },
	{ 0x03, "DNISO" },
	{ 0x04, "FE" },
	{ 0x05, "FECS" },
	{ 0x06, "HOST" },
	{ 0x07, "HOST_CPU" },
	{ 0x08, "HOST_CPU_NB" },
	{ 0x09, "ISO" },
	{ 0x0a, "MMU" },
	{ 0x0b, "MSPDEC" },
	{ 0x0c, "MSPPP" },
	{ 0x0d, "MSVLD" },
	{ 0x0e, "NISO" },
	{ 0x0f, "P2P" },
	{ 0x10, "PD" },
	{ 0x11, "PERF" },
	{ 0x12, "PMU" },
	{ 0x13, "RASTERTWOD" },
	{ 0x14, "SCC" },
	{ 0x15, "SCC_NB" },
	{ 0x16, "SEC" },
	{ 0x17, "SSYNC" },
	{ 0x18, "GR_COPY" },
	{ 0x19, "CE2" },
	{ 0x1a, "XV" },
	{ 0x1b, "MMU_NB" },
	{ 0x1c, "MSENC" },
	{ 0x1d, "DFALCON" },
	{ 0x1e, "SKED" },
	{ 0x1f, "AFALCON" },
	{}
};

static const struct nouveau_enum
nve0_fifo_fault_gpcclient[] = {
	{ 0x00, "L1_0" }, { 0x01, "T1_0" }, { 0x02, "PE_0" },
	{ 0x03, "L1_1" }, { 0x04, "T1_1" }, { 0x05, "PE_1" },
	{ 0x06, "L1_2" }, { 0x07, "T1_2" }, { 0x08, "PE_2" },
	{ 0x09, "L1_3" }, { 0x0a, "T1_3" }, { 0x0b, "PE_3" },
	{ 0x0c, "RAST" },
	{ 0x0d, "GCC" },
	{ 0x0e, "GPCCS" },
	{ 0x0f, "PROP_0" },
	{ 0x10, "PROP_1" },
	{ 0x11, "PROP_2" },
	{ 0x12, "PROP_3" },
	{ 0x13, "L1_4" }, { 0x14, "T1_4" }, { 0x15, "PE_4" },
	{ 0x16, "L1_5" }, { 0x17, "T1_5" }, { 0x18, "PE_5" },
	{ 0x19, "L1_6" }, { 0x1a, "T1_6" }, { 0x1b, "PE_6" },
	{ 0x1c, "L1_7" }, { 0x1d, "T1_7" }, { 0x1e, "PE_7" },
	{ 0x1f, "GPM" },
	{ 0x20, "LTP_UTLB_0" },
	{ 0x21, "LTP_UTLB_1" },
	{ 0x22, "LTP_UTLB_2" },
	{ 0x23, "LTP_UTLB_3" },
	{ 0x24, "GPC_RGG_UTLB" },
	{}
};

static void
nve0_fifo_intr_fault(struct nve0_fifo_priv *priv, int unit)
{
	u32 inst = nv_rd32(priv, 0x002800 + (unit * 0x10));
	u32 valo = nv_rd32(priv, 0x002804 + (unit * 0x10));
	u32 vahi = nv_rd32(priv, 0x002808 + (unit * 0x10));
	u32 stat = nv_rd32(priv, 0x00280c + (unit * 0x10));
	u32 gpc    = (stat & 0x1f000000) >> 24;
	u32 client = (stat & 0x00001f00) >> 8;
	u32 write  = (stat & 0x00000080);
	u32 hub    = (stat & 0x00000040);
	u32 reason = (stat & 0x0000000f);
	struct nouveau_object *engctx = NULL, *object;
	struct nouveau_engine *engine = NULL;
	const struct nouveau_enum *er, *eu, *ec;
	char erunk[6] = "";
	char euunk[6] = "";
	char ecunk[6] = "";
	char gpcid[3] = "";

	er = nouveau_enum_find(nve0_fifo_fault_reason, reason);
	if (!er)
		snprintf(erunk, sizeof(erunk), "UNK%02X", reason);

	eu = nouveau_enum_find(nve0_fifo_fault_engine, unit);
	if (eu) {
		switch (eu->data2) {
		case NVDEV_SUBDEV_BAR:
			nv_mask(priv, 0x001704, 0x00000000, 0x00000000);
			break;
		case NVDEV_SUBDEV_INSTMEM:
			nv_mask(priv, 0x001714, 0x00000000, 0x00000000);
			break;
		case NVDEV_ENGINE_IFB:
			nv_mask(priv, 0x001718, 0x00000000, 0x00000000);
			break;
		default:
			engine = nouveau_engine(priv, eu->data2);
			if (engine)
				engctx = nouveau_engctx_get(engine, inst);
			break;
		}
	} else {
		snprintf(euunk, sizeof(euunk), "UNK%02x", unit);
	}

	if (hub) {
		ec = nouveau_enum_find(nve0_fifo_fault_hubclient, client);
	} else {
		ec = nouveau_enum_find(nve0_fifo_fault_gpcclient, client);
		snprintf(gpcid, sizeof(gpcid), "%d", gpc);
	}

	if (!ec)
		snprintf(ecunk, sizeof(ecunk), "UNK%02x", client);

	nv_error(priv, "%s fault at 0x%010llx [%s] from %s/%s%s%s%s on "
		       "channel 0x%010llx [%s]\n", write ? "write" : "read",
		 (u64)vahi << 32 | valo, er ? er->name : erunk,
		 eu ? eu->name : euunk, hub ? "" : "GPC", gpcid, hub ? "" : "/",
		 ec ? ec->name : ecunk, (u64)inst << 12,
		 nouveau_client_name(engctx));

	object = engctx;
	while (object) {
		switch (nv_mclass(object)) {
		case NVE0_CHANNEL_IND_CLASS:
			nve0_fifo_recover(priv, engine, (void *)object);
			break;
		}
		object = object->parent;
	}

	nouveau_engctx_put(engctx);
}

static const struct nouveau_bitfield nve0_fifo_pbdma_intr[] = {
	{ 0x00000001, "MEMREQ" },
	{ 0x00000002, "MEMACK_TIMEOUT" },
	{ 0x00000004, "MEMACK_EXTRA" },
	{ 0x00000008, "MEMDAT_TIMEOUT" },
	{ 0x00000010, "MEMDAT_EXTRA" },
	{ 0x00000020, "MEMFLUSH" },
	{ 0x00000040, "MEMOP" },
	{ 0x00000080, "LBCONNECT" },
	{ 0x00000100, "LBREQ" },
	{ 0x00000200, "LBACK_TIMEOUT" },
	{ 0x00000400, "LBACK_EXTRA" },
	{ 0x00000800, "LBDAT_TIMEOUT" },
	{ 0x00001000, "LBDAT_EXTRA" },
	{ 0x00002000, "GPFIFO" },
	{ 0x00004000, "GPPTR" },
	{ 0x00008000, "GPENTRY" },
	{ 0x00010000, "GPCRC" },
	{ 0x00020000, "PBPTR" },
	{ 0x00040000, "PBENTRY" },
	{ 0x00080000, "PBCRC" },
	{ 0x00100000, "XBARCONNECT" },
	{ 0x00200000, "METHOD" },
	{ 0x00400000, "METHODCRC" },
	{ 0x00800000, "DEVICE" },
	{ 0x02000000, "SEMAPHORE" },
	{ 0x04000000, "ACQUIRE" },
	{ 0x08000000, "PRI" },
	{ 0x20000000, "NO_CTXSW_SEG" },
	{ 0x40000000, "PBSEG" },
	{ 0x80000000, "SIGNATURE" },
	{}
};

static void
nve0_fifo_intr_pbdma(struct nve0_fifo_priv *priv, int unit)
{
	u32 stat = nv_rd32(priv, 0x040108 + (unit * 0x2000));
	u32 addr = nv_rd32(priv, 0x0400c0 + (unit * 0x2000));
	u32 data = nv_rd32(priv, 0x0400c4 + (unit * 0x2000));
	u32 chid = nv_rd32(priv, 0x040120 + (unit * 0x2000)) & 0xfff;
	u32 subc = (addr & 0x00070000) >> 16;
	u32 mthd = (addr & 0x00003ffc);
	u32 show = stat;

	if (stat & 0x00800000) {
		if (!nve0_fifo_swmthd(priv, chid, mthd, data))
			show &= ~0x00800000;
	}

	if (show) {
		nv_error(priv, "PBDMA%d:", unit);
		nouveau_bitfield_print(nve0_fifo_pbdma_intr, show);
		pr_cont("\n");
		nv_error(priv,
			 "PBDMA%d: ch %d [%s] subc %d mthd 0x%04x data 0x%08x\n",
			 unit, chid,
			 nouveau_client_name_for_fifo_chid(&priv->base, chid),
			 subc, mthd, data);
	}

	nv_wr32(priv, 0x0400c0 + (unit * 0x2000), 0x80600008);
	nv_wr32(priv, 0x040108 + (unit * 0x2000), stat);
}

static void
nve0_fifo_intr_runlist(struct nve0_fifo_priv *priv)
{
	u32 mask = nv_rd32(priv, 0x002a00);
	while (mask) {
		u32 engn = __ffs(mask);
		wake_up(&priv->engine[engn].wait);
		nv_wr32(priv, 0x002a00, 1 << engn);
		mask &= ~(1 << engn);
	}
}

static void
nve0_fifo_intr_engine(struct nve0_fifo_priv *priv)
{
	nouveau_event_trigger(priv->base.uevent, 1, 0);
}

static void
nve0_fifo_intr(struct nouveau_subdev *subdev)
{
	struct nve0_fifo_priv *priv = (void *)subdev;
	u32 mask = nv_rd32(priv, 0x002140);
	u32 stat = nv_rd32(priv, 0x002100) & mask;

	if (stat & 0x00000001) {
		nve0_fifo_intr_bind(priv);
		nv_wr32(priv, 0x002100, 0x00000001);
		stat &= ~0x00000001;
	}

	if (stat & 0x00000010) {
		nv_error(priv, "PIO_ERROR\n");
		nv_wr32(priv, 0x002100, 0x00000010);
		stat &= ~0x00000010;
	}

	if (stat & 0x00000100) {
		nve0_fifo_intr_sched(priv);
		nv_wr32(priv, 0x002100, 0x00000100);
		stat &= ~0x00000100;
	}

	if (stat & 0x00010000) {
		nve0_fifo_intr_chsw(priv);
		nv_wr32(priv, 0x002100, 0x00010000);
		stat &= ~0x00010000;
	}

	if (stat & 0x00800000) {
		nv_error(priv, "FB_FLUSH_TIMEOUT\n");
		nv_wr32(priv, 0x002100, 0x00800000);
		stat &= ~0x00800000;
	}

	if (stat & 0x01000000) {
		nv_error(priv, "LB_ERROR\n");
		nv_wr32(priv, 0x002100, 0x01000000);
		stat &= ~0x01000000;
	}

	if (stat & 0x08000000) {
		nve0_fifo_intr_dropped_fault(priv);
		nv_wr32(priv, 0x002100, 0x08000000);
		stat &= ~0x08000000;
	}

	if (stat & 0x10000000) {
		u32 mask = nv_rd32(priv, 0x00259c);
		while (mask) {
			u32 unit = __ffs(mask);
			nve0_fifo_intr_fault(priv, unit);
			nv_wr32(priv, 0x00259c, (1 << unit));
			mask &= ~(1 << unit);
		}
		stat &= ~0x10000000;
	}

	if (stat & 0x20000000) {
		u32 mask = nv_rd32(priv, 0x0025a0);
		while (mask) {
			u32 unit = __ffs(mask);
			nve0_fifo_intr_pbdma(priv, unit);
			nv_wr32(priv, 0x0025a0, (1 << unit));
			mask &= ~(1 << unit);
		}
		stat &= ~0x20000000;
	}

	if (stat & 0x40000000) {
		nve0_fifo_intr_runlist(priv);
		stat &= ~0x40000000;
	}

	if (stat & 0x80000000) {
		nve0_fifo_intr_engine(priv);
		nv_wr32(priv, 0x002100, 0x80000000);
		stat &= ~0x80000000;
	}

	if (stat) {
		nv_error(priv, "INTR 0x%08x\n", stat);
		nv_mask(priv, 0x002140, stat, 0x00000000);
		nv_wr32(priv, 0x002100, stat);
	}
}

static void
nve0_fifo_uevent_enable(struct nouveau_event *event, int type, int index)
{
	struct nve0_fifo_priv *priv = event->priv;
	nv_mask(priv, 0x002140, 0x80000000, 0x80000000);
}

static void
nve0_fifo_uevent_disable(struct nouveau_event *event, int type, int index)
{
	struct nve0_fifo_priv *priv = event->priv;
	nv_mask(priv, 0x002140, 0x80000000, 0x00000000);
}

int
nve0_fifo_fini(struct nouveau_object *object, bool suspend)
{
	struct nve0_fifo_priv *priv = (void *)object;
	int ret;

	ret = nouveau_fifo_fini(&priv->base, suspend);
	if (ret)
		return ret;

	/* allow mmu fault interrupts, even when we're not using fifo */
	nv_mask(priv, 0x002140, 0x10000000, 0x10000000);
	return 0;
}

int
nve0_fifo_init(struct nouveau_object *object)
{
	struct nve0_fifo_priv *priv = (void *)object;
	int ret, i;

	ret = nouveau_fifo_init(&priv->base);
	if (ret)
		return ret;

	/* enable all available PBDMA units */
	nv_wr32(priv, 0x000204, 0xffffffff);
	priv->spoon_nr = hweight32(nv_rd32(priv, 0x000204));
	nv_debug(priv, "%d PBDMA unit(s)\n", priv->spoon_nr);

	/* PBDMA[n] */
	for (i = 0; i < priv->spoon_nr; i++) {
		nv_mask(priv, 0x04013c + (i * 0x2000), 0x10000100, 0x00000000);
		nv_wr32(priv, 0x040108 + (i * 0x2000), 0xffffffff); /* INTR */
		nv_wr32(priv, 0x04010c + (i * 0x2000), 0xfffffeff); /* INTREN */
	}

	nv_wr32(priv, 0x002254, 0x10000000 | priv->user.bar.offset >> 12);

	nv_wr32(priv, 0x002100, 0xffffffff);
	nv_wr32(priv, 0x002140, 0x7fffffff);
	return 0;
}

void
nve0_fifo_dtor(struct nouveau_object *object)
{
	struct nve0_fifo_priv *priv = (void *)object;
	int i;

	nouveau_gpuobj_unmap(&priv->user.bar);
	nouveau_gpuobj_ref(NULL, &priv->user.mem);

	for (i = 0; i < FIFO_ENGINE_NR; i++) {
		nouveau_gpuobj_ref(NULL, &priv->engine[i].runlist[1]);
		nouveau_gpuobj_ref(NULL, &priv->engine[i].runlist[0]);
	}

	nouveau_fifo_destroy(&priv->base);
}

int
nve0_fifo_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
	       struct nouveau_oclass *oclass, void *data, u32 size,
	       struct nouveau_object **pobject)
{
	struct nve0_fifo_impl *impl = (void *)oclass;
	struct nve0_fifo_priv *priv;
	int ret, i;

	ret = nouveau_fifo_create(parent, engine, oclass, 0,
				  impl->channels - 1, &priv);
	*pobject = nv_object(priv);
	if (ret)
		return ret;

	INIT_WORK(&priv->fault, nve0_fifo_recover_work);

	for (i = 0; i < FIFO_ENGINE_NR; i++) {
		ret = nouveau_gpuobj_new(nv_object(priv), NULL, 0x8000, 0x1000,
					 0, &priv->engine[i].runlist[0]);
		if (ret)
			return ret;

		ret = nouveau_gpuobj_new(nv_object(priv), NULL, 0x8000, 0x1000,
					 0, &priv->engine[i].runlist[1]);
		if (ret)
			return ret;

		init_waitqueue_head(&priv->engine[i].wait);
	}

	ret = nouveau_gpuobj_new(nv_object(priv), NULL, impl->channels * 0x200,
				0x1000, NVOBJ_FLAG_ZERO_ALLOC, &priv->user.mem);
	if (ret)
		return ret;

	ret = nouveau_gpuobj_map(priv->user.mem, NV_MEM_ACCESS_RW,
				&priv->user.bar);
	if (ret)
		return ret;

	priv->base.uevent->enable = nve0_fifo_uevent_enable;
	priv->base.uevent->disable = nve0_fifo_uevent_disable;
	priv->base.uevent->priv = priv;

	nv_subdev(priv)->unit = 0x00000100;
	nv_subdev(priv)->intr = nve0_fifo_intr;
	nv_engine(priv)->cclass = &nve0_fifo_cclass;
	nv_engine(priv)->sclass = nve0_fifo_sclass;
	return 0;
}

struct nouveau_oclass *
nve0_fifo_oclass = &(struct nve0_fifo_impl) {
	.base.handle = NV_ENGINE(FIFO, 0xe0),
	.base.ofuncs = &(struct nouveau_ofuncs) {
		.ctor = nve0_fifo_ctor,
		.dtor = nve0_fifo_dtor,
		.init = nve0_fifo_init,
		.fini = nve0_fifo_fini,
	},
	.channels = 4096,
}.base;